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Test your basic knowledge |
Dairy Cattle And Reproduction
Start Test
Study First
Subjects
:
industries
,
dairy
Instructions:
Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. When are dairy cattle dehorned?
visual evaluation (BSE)
Follical Stimulating in males
~1 month
#1 cost in production
2. Milk ~305 days - dry 60 days prior to calving
burdizzo
Dairy Cattle milking schedule
1. more cost effective - 2. powdered milk is in excess production
Sperm growth rate
3. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)
seasonally polyestrous
colostrum
things to check for in a breeding soundness exam (BSE)
prostaglandin
4. Milk is 15% ________ and 85% __________.
why does the cow need fat deposits during pregnancy?
what has to happen for males for copulation to occur
dry matter and water
spermatogenesis
5. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm
Follical Stimulating in males
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
Grading choice
reason for seasonal breeding periods
6. What about the sperm for a bull which has been castrated but still has testicles?
ewe ovulation
mare estrus cycle
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
feeding a high producing dairy cow
7. 19-23 (21) days
cow gestation
sow estrus cycle
ewe gestation
Where livelihood is in agriculture
8. 4-6 days
Dairy Cattle Lactation (standard)
prostaglandin
burdizzo
mare estrus
9. 24 hours before end of estrus cycle
leydid or interstitial cells
mare ovulation
dry matter and water
Sperm growth rate
10. ~60 days before calving
penis sizes vs delivering methods
vagina
ewe gestation
dry-off time in dairy cattle
11. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg
castration
sperm cell
Dairy Cattle Gestation
mare's estrous cycle
12. Days which have increasing daylight hours
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13. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has
estrous
sow estrus
prostaglandin
rectal palpation (BSE)
14. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.
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15. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.
oviducts
ewe's estrous cycle
uterus
epididymis: definition - 3 parts - 4 functions
16. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
feeding a high producing dairy cow
cryptorchid
estrous
sow estrus cycle
17. Allows extension of penis without fibro-elastic penis
reasons for castration
sigmoid flexure
Avg. bull specs
Hormones from both the fetus and the mom.
18. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.
age and castration
uterus
sow estrus cycle
libido test (BSE)
19. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.
dartos muscle
colostrum
elastrator
hormones
20. Implies the amount of estrogen production
age and castration
femininity of a heifer
reason for seasonal breeding periods
retractor muscles
21. Milk is 15% ________ and 85% __________.
ewe estrus cycle
Dairy Cattle milking schedule
dry matter and water
ewe gestation
22. (switzerland) 2nd in size and milk production - most muscle -
cremaster muscle
feeding a high producing dairy cow
Brown Swiss Cow
hormones
23. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).
estrous
dry matter and water
hormones
~1 month
24. (LH) causes female's egg to break (her period)
Lutinizing Hormone in females
growth lost from castration methods (knife & band)
ewe estrus
butterfat
25. Serves as a bone cradle for the reproductive system. used greatly in palpation as a 'landmark'.
pelvis
scrotum
femininity of a heifer
leydid or interstitial cells
26. 30-38 hours after estrus cycle begins
growth lost from castration methods (knife & band)
sow ovulation
behavioral signs of estrus
cervix
27. 336 days
Reasons for gestation length being affected
age and castration
mare gestation
elastrator
28. Sperm is produced here
seminiferous tubules
mare estrus cycle
Mares
oviducts
29. The more stressed out the male is - the less sperm he is going to produce
femininity of a heifer
estrus
humans: stress level vs sperm
6-8 weeks
30. Male on one pin and female on other side
Follical Stimulating in males
libido test (BSE)
Dairy Cattle Gestation
ewe's estrous cycle
31. Front feet and head first. (except for hogs and dogs)
normal presentation of the fetus
effects of BST
things to check for in a breeding soundness exam (BSE)
elastrator
32. Parturition is controlled by...
Size of cow in relation to the amount of milk produced
sow estrus cycle
scrotal circumference (BSE)
Hormones from both the fetus and the mom.
33. 16-20 hours
cow estrus
normal presentation of the fetus
Parturition
cow gestation
34. ~60 days before calving
dry-off time in dairy cattle
epididymis: definition - 3 parts - 4 functions
seasonally polyestrous
Culls bulls earlier (2 reasons)
35. Days which have decreasing daylight hours
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36. 265-285 days
penis sizes vs delivering methods
mare gestation
things to check for in a breeding soundness exam (BSE)
Dairy Cattle Gestation
37. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.
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38. Days which have increasing daylight hours
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39. Failure to have one testis (gonad) to descend
mare estrus
monorchid
what has to happen for males for copulation to occur
seasonally polyestrous
40. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)
polyestrous
feeding a high producing dairy cow
burdizzo
purpose of Breeding Soundness Exam (BSE) for males
41. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated
uterus
Grading choice
testosterone
burdizzo
42. Start of the reproductive tract for the female. located outside of the body
ewe ovulation
prostate gland
6-8 weeks
vulva
43. Failure to have both testis (gonads) descend
retractor muscles
Reasons for gestation length being affected
cryptorchid
Avg. bull specs
44. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days
epididymis: definition - 3 parts - 4 functions
you want as much sperm as possible to come in contact with the egg before ovulation. the main idea is to have the sperm already in the oviduct when the egg passes through
Mares
ewe estrus cycle
45. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat
Holstein Cow
dairy cattle pregnancy check
burdizzo
accessory sex glands
46. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %
sigmoid flexure
Jersey Cow
Testicles will produce testosterone but not sperm. Bull will attempt to mate - but will be sterile
4 major reasons for culling dairy cows
47. Luteolysis happens because of the ____________ hormone
reason for seasonal breeding periods
testis (gonads)
leydid or interstitial cells
prostaglandin
48. Animal which has been castrated after puberty
why does the cow need fat deposits during pregnancy?
stag
cow gestation
humans: stress level vs sperm
49. Start of the reproductive tract for the female. located outside of the body
stag
Lutinizing Hormone in females
semen evaluation (BSE)
vulva
50. Sperm production
retractor muscles
spermatogenesis
visual evaluation (BSE)
urethra